Understanding the Relationship

* Frequency (f): How many wave cycles pass a point per second (measured in Hertz, Hz).

* Wavelength (λ): The distance between two corresponding points on successive waves (measured in meters, m).

* Speed (v): How fast the wave travels (measured in meters per second, m/s).

The Formula

The relationship between these is:

v = fλ

Solving for Frequency

1. Rearrange the formula: To find frequency (f), we isolate it:

f = v / λ

2. Plug in the values:

* v = 40 m/s

* λ = 4 m

* f = 40 m/s / 4 m

3. Calculate:

f = 10 Hz

Therefore, the frequency of the wave is 10 Hz.